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|Guest Message by DevFuse|
Posted 07 July 2010 - 05:27 PM
Posted 07 July 2010 - 06:04 PM
If he is referring to 5.1 which is silicone but compatible with the older DOT4 and earlier minerals then it's fine.
If it's DOT 5 then..
Are you going to flush the whole system, clean/ replace (ideally replace) all the rubbers (including master cylinder) and change the fluid periodically to get rid of the water that will collect at the lowest points of the system?
If yes, then go for it. You'll get a fluid that's less prone to absorbing water and boils at a higher temperature.
If no. Then don't do it, you'll have a fluid where the water pools in the low points and so induces rust there (callipers?), it will for a sort of gel where it mixes with the old fluid (hence change rubbers) and so partially block flow of fluid.
The 5.1 still has the water pooling issue as it is not hygroscopic, thus does not absorb water, but water does naturally get into the system and so where the older stuff holds the water in suspension, the 5.1 doesn't.
Posted 07 July 2010 - 09:04 PM
Posted 09 July 2010 - 10:50 PM
Edited by GavinS1, 09 July 2010 - 10:51 PM.
It really is very simple......just incredibly complicated to explain.
Posted 10 July 2010 - 12:12 PM
5 = silicon, as the man said
5.1= aka castrol SRF silicon ester (not at all the same as silicon) and compatible with dot 3/4 which glycol-ester based (similar to antifreeze)
Posted 11 July 2010 - 04:13 PM
Posted 11 July 2010 - 05:07 PM
Posted 11 July 2010 - 07:12 PM
Edited by comem47, 11 July 2010 - 07:33 PM.
Posted 11 July 2010 - 08:15 PM
............Dry boiling point / Wet boiling point
DOT 3 - 205 °C (401 °F)/140 °C (284 °F)
DOT 4 - 230 °C (446 °F)/155 °C (311 °F)
DOT 5 - 260 °C (500 °F)/180 °C (356 °F)
DOT 5.1 - 270 °C (518 °F)/190 °C (374 °F)
Edited by Quikr, 11 July 2010 - 08:16 PM.
more, more, more....
Posted 12 July 2010 - 03:08 AM
Here's a quote from the web on the Ford Truck stuff:
Ford Heavy Duty DOT 3
550 deg F dry,
290 deg F wet.
Ford Heavy Duty DOT 3 is VERY inexpensive and ispopular among racers because of its excellent dry boiling point. Itabsorbs moisture quickly, but the racers don't care since they change theirfluid frequently. Comes in metal cans so it may be stored. I wouldnot use this in my Impala for the street.
Edited by comem47, 12 July 2010 - 03:26 AM.
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